Gilalite is a

copper Copper is a chemical element; it has symbol Cu (from Latin ) and atomic number 29. It is a soft, malleable, and ductile metal with very high thermal and electrical conductivity. A freshly exposed surface of pure copper has a pinkish-orang ...

silicate mineral Silicate minerals are rock-forming minerals made up of silicate groups. They are the largest and most important class of minerals and make up approximately 90 percent of Earth's crust. In mineralogy, the crystalline forms of silica (silicon dio ...

with chemical composition of Cu₅Si₆O₁₇·7(H₂O). It occurs as a retrograde metamorphic phase in a calc-silicate and sulfide

skarn Skarns or tactites are coarse-grained metamorphic rocks that form by replacement of carbonate-bearing rocks during regional or contact metamorphism and metasomatism. Skarns may form by metamorphic recrystallization of impure carbonate protoliths, ...

deposit. It occurs as fracture fillings and incrustations associated with

diopside Diopside is a monoclinic pyroxene mineral with composition . It forms complete solid solution series with hedenbergite () and augite, and partial solid solutions with orthopyroxene and pigeonite. It forms variably colored, but typically dull ...

crystals. It is commonly found in the form of spherules of radial fibers. Gilalite-Quartz-d05-97a

It was first described for an occurrence in the Christmas

porphyry copper Porphyry copper deposits are copper ore bodies that are formed from hydrothermal circulation, hydrothermal fluids that originate from a voluminous magma chamber several kilometers below the deposit itself. Predating or associated with those flui ...

mine in

Gila County, Arizona Gila County ( ) is a county in the central part of the U.S. state of Arizona. As of the 2020 census, the population was 53,272. The county seat is Globe. Gila County comprises the Payson, Arizona micropolitan statistical area which is inclu ...

in 1980 along with the mineral

apachite Apachite is a copper silicate mineral with a general formula of Cu9Si10O29·11H2O.American Geological InstituteUniversity of Texas Libraries. "Glossary of Geology." September 8, 2010 The name is associated with the Apache tribe residents of the are ...

.F.P. Cesbron and S.A. Williams; March 1980;"Apachite and gilalite, two new copper silicates from Christmas, Arizona" Mineralogical Magazine, Vol. 43, pp. 639-41 It derives its name from this locality. It has also been reported from the Goodsprings District,

Clark County, Nevada Clark County is the most populous County (United States), county in the U.S. state of Nevada with 2,265,461 residents as of the 2020 United States census, 2020 census. The county is the location of the state's three largest cities, Las Vegas (t ...

;

Juazeiro do Norte Juazeiro do Norte is a city in the state of Ceará state in northeastern Brazil. It is located 491 km south of the state capital Fortaleza in the semiarid sertão. The municipality has a population of 276,264 (2020 official estimate) and co ...

, Ceara State,

Brazil Brazil, officially the Federative Republic of Brazil, is the largest country in South America. It is the world's List of countries and dependencies by area, fifth-largest country by area and the List of countries and dependencies by population ...

and a slag area in Lavrion District,

Attica Attica (, ''Attikḗ'' (Ancient Greek) or , or ), or the Attic Peninsula, is a historical region that encompasses the entire Athens metropolitan area, which consists of the city of Athens, the capital city, capital of Greece and the core cit ...

Greece Greece, officially the Hellenic Republic, is a country in Southeast Europe. Located on the southern tip of the Balkan peninsula, it shares land borders with Albania to the northwest, North Macedonia and Bulgaria to the north, and Turkey to th ...

References

Copper(II) minerals Unclassified silicates Monoclinic minerals {{silicate-mineral-stub